U.S. Secretary Of State John Kerry appeared on all five major news talk shows Sunday, detailing the “build-up of extraordinary circumstantial evidence” pointing to Russia as the source of the antiaircraft missile that shot down Malaysia Airlines Flight 17 over rebel-held territory in Ukraine, killing 298 passengers and crew members.

“It is clear that Russia supports the separatists, supplies the separatists, encourages the separatists, trains the separatists,” Kerry said on NBC’s “Meet the Press.” “Russia needs to step up and make a difference here.” Kerry said the U.S. has observed major supplies, including rocket launchers, artillery, and tanks, moving into the separatist region in the past month and said there was an SA-11 missile system in the vicinity just hours before the shoot-down. He said there were also social-media records pointing to separatists bragging about the shoot-down of a plane at the same time.

He said the pro-Russia separatists’ self appointed defense minster Igor Strelkov even bragged about shooting down a transport on social media and only removed the posting after it became clear it was a civilian plane. Kerry said the U.S. also picked up the imagery of the missile launch and the trajectory with all indicators showing it took place at exactly the same time that the Malaysia Airlines flight disappeared from the radar.

“We are not drawing the final conclusion here, but there’s a lot that points at the need for Russia to be responsible,” Kerry said.

Kerry also said the U.S., which already has “taken tough sanctions” against Russia, also hopes “this is a profound wake-up call for those countries in Europe that have wanted to kind of, you know, go slow and soft-pedal this.” He also criticized the scene at the the crash site and faulted the separatists and Russia for not meeting their promise of “unfettered access.”

“What’s happening is really grotesque,” Kerry said. “It is contrary to everything that President Putin and Russia said that they would do. There are reports of drunken separatist soldiers unceremoniously piling bodies into trucks, removing both bodies, as well as evidence, from the site.”

Lawmakers also weighed in on the issue:

South Carolina RepublicanSen. Lindsey Graham on “Meet the Press:” Kerry “didn’t call Putin the thug that he is. He didn’t call for arming the Ukraine so they can defend themselves against rebel separatists supported by Russia. How about sanctions that would hit (Russia President) Putin as an individual? Their energy sector, their banking sector. The Europeans are never going to lead on this issue. It is indispensable that America lead. President Obama is trying to be deliberative. It comes off as indecisive. He’s trying to be thoughtful. It comes off as weakness.”

New Jersey Democratic Sen. Robert Menendez, chairman of Senate Foreign Relations Committee, on “Fox News Sunday:” “Before the shoot down, I was an advocate of further reaching sanctions to stop Russia’s aggression and let Putin know the consequences of continuing that form of aggression. The West, including the United States, has to have a far more significant response than we’ve seen to date. It’s what I thought before the shoot down and certainly this is a despicable act that needs to be resolved by the West.”

Michigan Republican Rep. Mike Rogers on ABC’s “This Week:” “The evidence is mounting that this had Russian hands at least at some point on this piece of equipment that led to the massacre of those individuals on that airplane. This certainly eliminates Putin’s plausible deniability. This is an opportunity to get our European allies really engaged. It’s time to end Putin’s gamesmanship in Ukraine. It means that the United States needs to end its tepid response to this whole operation by increasing intelligence cooperation, logistics, training opportunities. And we need our European allies to step up its opportunity to put really tough sanctions.”

New York Republican Rep. Peter King on CBS’s “Face the Nation:” “Kerry laid out the case against Russia. There can be no reasonable doubt that Russia was involved, that Putin was involved by providing the type of weaponry. U.S. and its Western allies have to make it clear to Putin that the rules of the game have changed that he’s violated civilized norms. I’ve been so disappointed in so many European nations. We have to take very severe economic sanctions and once that are symbolic. For instance, we should talk about cancelling the World Cup. Why should countries be going to World Cup in Moscow? So long as Putin is not allowing access to the crash site and so long is the crime scene is being polluted, this man has shown he’s totally incapable of functioning in a civilized world. (What Putin is doing) is what a mafia guy does, not what a world leader does.”

California Democratic Sen. Dianne Feinstein on CNN’s “State of the Union:” “Putin, you have to man up. You should talk to the world. You should say if this was a mistake, which I hope it was, say it. Even if it was a mistake, it’s a horrendous mistake to make. And I think it points out the futility of what’s happening in the Ukraine, because there will be repercussions from this. The world has to rise up and say we’ve had enough of this. I think Europe has to come together. I think Germany in particular has to lead. I think we have to continue with sanctions. This is where ICAO (International Civil Aviation Organization), where the United Nations has to step in. There have to be some penalties for this kind of a shoot-down, in this day and age, with the amazingly technical piece of equipment, which should only go to people who have some ethical compass. Now we find out it’s being given to separatists who are, in many respects, thugs.”